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Mathematics, 30.10.2020 06:00 potatocow

Find the difference. (3s^{2} +2st+5t^{2} )-(-2s^{2} +st+7t^{2} )

Possible Answers:
A: 5s^{2} +st-2t^{2}
B: s^{2} +st-2t^{2}
C: 5s^{2} +3st+12t^{2}
D: s^{2} +3st+12t^{2}

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